Over half of London's bus fleet will upgraded to meet the latest Euro 6 emissions standard, so around 5,000 buses will be given a new exhaust system to slash emissions by up to 95 per cent.

Other measures set out to improve the capital's air pollution troubles include a plan to phase out diesel-only buses, and a commitment to buying only hybrid or zero-emission double-decker buses from 2018.

London’s buses have been one of the biggest contributors to harmful pollution coming from our transport network, and I’m proud that we continue to take some of the boldest action of any city in the world to clean up our bus fleet.

London’s air quality is a direct cause of illness and premature death across our city, and TfL will continue to lead the way tackling our air pollution crisis head-on.